/* ═══════════════════════════════════════════════════════════
   مستكشف المسارات — Programme explorer
   يستبدل أربع طبقات (كليات ← كلية ← برنامج ← خطة) بصفحة واحدة
   ═══════════════════════════════════════════════════════════ */

/* ── مبدّل البرنامج ── */
.switcher{
  display:inline-flex; padding:5px; gap:4px; border-radius:100px;
  background:var(--surface-2); border:1px solid var(--line)}
.switcher button,
.switcher a{
  display:flex; align-items:center; gap:9px; padding:10px 22px; border:0; cursor:pointer;
  border-radius:100px; background:transparent; color:var(--ink-2);
  font-family:'Tajawal'; font-weight:700; font-size:15px;
  transition:background .22s var(--ease), color .22s var(--ease)}
.switcher button[aria-selected="true"],
.switcher a[aria-selected="true"]{background:var(--brass); color:#fff; box-shadow:var(--shadow-1)}
[data-theme="dark"] .switcher button[aria-selected="true"],
[data-theme="dark"] .switcher a[aria-selected="true"]{color:#160F04}
.switcher button:not([aria-selected="true"]):hover,
.switcher a:not([aria-selected="true"]):hover{color:var(--ink); background:var(--surface-3)}
.switcher .sw-h{font-size:12px; font-weight:600; opacity:.72; font-family:'IBM Plex Sans Arabic'; font-variant-numeric:tabular-nums}

/* ── لوحة الحقائق ── */
.facts{display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--line); border:1px solid var(--line); border-radius:var(--r); overflow:hidden}
.fact{background:var(--surface); padding:20px 18px}
.fact b{display:block; font-family:'Tajawal'; font-weight:800; font-size:30px; line-height:1; color:var(--ink); font-variant-numeric:tabular-nums; letter-spacing:-.02em}
.fact b .u{font-size:.46em; font-weight:700; color:var(--ink-3); margin-inline-start:3px}
.fact span{display:block; margin-top:8px; font-size:12.5px; color:var(--ink-3); line-height:1.5}
.fact.hi b{color:var(--brass)}
@media (max-width:940px){.facts{grid-template-columns:repeat(3,1fr)}}
@media (max-width:520px){.facts{grid-template-columns:repeat(2,1fr)}}

/* ═══ سكّة الرحلة ═══ */
.journey{position:relative}
.rail{
  position:relative; display:grid; gap:0;
  grid-template-columns:repeat(var(--n,6),1fr);
  margin-block:38px 0}
/* الخط الواصل */
.rail::before{
  content:''; position:absolute; inset-inline:calc(100%/var(--n,6)/2); inset-block-start:23px;
  height:3px; border-radius:3px;
  background:linear-gradient(to left, var(--brass) 0%, var(--lapis) 55%, var(--ok) 100%);
  opacity:.28}
[dir="ltr"] .rail::before{background:linear-gradient(to right, var(--brass) 0%, var(--lapis) 55%, var(--ok) 100%)}

.node{
  position:relative; display:flex; flex-direction:column; align-items:center; gap:11px;
  background:none; border:0; cursor:pointer; padding:0 6px 10px; text-align:center}
.node-dot{
  width:48px; height:48px; border-radius:50%; display:grid; place-items:center;
  background:var(--surface); border:3px solid var(--line-2); color:var(--ink-3);
  font-family:'Tajawal'; font-weight:800; font-size:17px; font-variant-numeric:tabular-nums;
  transition:border-color .24s var(--ease), background .24s var(--ease), color .24s var(--ease), transform .24s var(--ease);
  position:relative; z-index:2}
.node:hover .node-dot{border-color:var(--brass); color:var(--brass); transform:scale(1.06)}
.node[aria-selected="true"] .node-dot{
  background:var(--brass); border-color:var(--brass); color:#fff; transform:scale(1.1);
  box-shadow:0 0 0 6px var(--brass-soft)}
[data-theme="dark"] .node[aria-selected="true"] .node-dot{color:#160F04}
.node-lbl{font-family:'Tajawal'; font-weight:700; font-size:13.5px; line-height:1.4; color:var(--ink-2); max-width:14ch}
.node[aria-selected="true"] .node-lbl{color:var(--ink)}
.node-stage{font-size:10.5px; font-weight:600; letter-spacing:.05em; color:var(--ink-3); text-transform:uppercase}

/* ألوان المراحل */
.node[data-stage="basic"] .node-lbl::before{background:var(--lapis)}
.node[data-stage="bridge"] .node-lbl::before{background:var(--warn)}
.node[data-stage="clinical"] .node-lbl::before{background:var(--brass)}
.node[data-stage="internship"] .node-lbl::before{background:var(--ok)}

/* ── لوحة السنة ── */
.year{
  margin-top:14px; background:var(--surface); border:1px solid var(--line); border-radius:var(--r-lg);
  overflow:hidden; box-shadow:var(--shadow-2)}
.year-top{
  display:grid; grid-template-columns:1.4fr .6fr; gap:28px;
  padding:30px 32px; border-bottom:1px solid var(--line)}
.year-top h3{font-size:26px; margin-bottom:10px}
.year-top p{font-size:15.5px; color:var(--ink-2); line-height:1.75; max-width:60ch}
.year-side{display:grid; gap:1px; background:var(--line); border:1px solid var(--line); border-radius:var(--r-sm); overflow:hidden; align-self:start}
.year-side div{background:var(--surface); padding:14px 16px}
.year-side b{display:block; font-family:'Tajawal'; font-weight:800; font-size:16px; color:var(--brass)}
.year-side span{font-size:11.5px; color:var(--ink-3)}

.stage-tag{
  display:inline-flex; align-items:center; gap:7px; padding:5px 13px; border-radius:100px;
  font-size:12px; font-weight:600; margin-bottom:12px}
.stage-basic{background:var(--lapis-soft); color:var(--lapis)}
.stage-bridge{background:var(--warn-soft); color:var(--warn)}
.stage-clinical{background:var(--brass-soft); color:var(--brass)}
.stage-internship{background:var(--ok-soft); color:var(--ok)}

/* ── مقررات السنة ── */
.year-courses{padding:26px 32px 30px}
.yc-head{display:flex; align-items:center; gap:12px; flex-wrap:wrap; margin-bottom:18px}
.yc-head h4{font-size:17px}
.course-list{display:grid; gap:8px}
.course{
  background:var(--ground); border:1px solid var(--line); border-radius:var(--r-sm);
  overflow:hidden; transition:border-color .18s var(--ease)}
.course:hover{border-color:var(--brass-line)}
.course-q{
  width:100%; display:grid; grid-template-columns:auto 1fr auto auto auto; gap:14px; align-items:center;
  padding:13px 16px; background:none; border:0; cursor:pointer; text-align:start}
.course-code{
  font-variant-numeric:tabular-nums; font-size:11.5px; font-weight:600; color:var(--ink-3);
  background:var(--surface); border:1px solid var(--line); padding:3px 9px; border-radius:5px; white-space:nowrap}
.course-name{font-weight:600; font-size:14.5px; line-height:1.45}
.course-owner{display:block; font-size:11.5px; font-weight:500; color:var(--ink-3); margin-block-start:2px}
.course-h{font-size:12.5px; font-weight:600; color:var(--brass); font-variant-numeric:tabular-nums; white-space:nowrap}
.course-pm{width:16px; height:16px; color:var(--ink-3); transition:transform .22s var(--ease)}
.course.open .course-pm{transform:rotate(45deg); color:var(--brass)}
.course-a{display:grid; grid-template-rows:0fr; transition:grid-template-rows .3s var(--ease)}
.course.open .course-a{grid-template-rows:1fr}
.course-a > div{overflow:hidden}
.course-a p{padding:0 16px 16px; font-size:13.5px; color:var(--ink-2); line-height:1.8; max-width:76ch}

.type-pill{font-size:10.5px; font-weight:600; padding:2px 8px; border-radius:100px; white-space:nowrap}
.type-basic{background:var(--lapis-soft); color:var(--lapis)}
.type-clinical{background:var(--brass-soft); color:var(--brass)}
.type-univ{background:var(--surface-3); color:var(--ink-3)}

/* ── شريط التركيب ── */
.struct-bar{display:flex; height:44px; border-radius:var(--r-sm); overflow:hidden; border:1px solid var(--line)}
.struct-bar div{
  display:grid; place-items:center; font-size:12.5px; font-weight:600; color:#fff;
  font-variant-numeric:tabular-nums; transition:flex .4s var(--ease)}
.struct-legend{display:flex; flex-wrap:wrap; gap:18px; margin-top:14px; font-size:13px}
.struct-legend span{display:flex; align-items:center; gap:8px; color:var(--ink-2)}
.struct-legend i{width:11px; height:11px; border-radius:3px; flex:none}

/* ── حاسبة التكلفة ── */
.calc{display:grid; grid-template-columns:1fr 1fr; gap:24px; align-items:start}
.calc-out{
  background:var(--ink-solid); color:#F2F5F8; border-radius:var(--r); padding:26px 28px;
  display:grid; gap:1px; background:var(--ink-solid)}
.calc-row{display:flex; justify-content:space-between; align-items:baseline; padding:11px 0; border-bottom:1px solid rgba(242,245,248,.12); font-size:14px}
.calc-row:last-of-type{border-bottom:0}
.calc-row span{color:rgba(242,245,248,.7)}
.calc-row b{font-variant-numeric:tabular-nums; font-weight:600}
.calc-total{
  margin-top:14px; padding-top:16px; border-top:2px solid var(--brass);
  display:flex; justify-content:space-between; align-items:baseline}
.calc-total span{font-size:13px; color:rgba(242,245,248,.7)}
.calc-total b{font-family:'Tajawal'; font-weight:800; font-size:30px; color:var(--brass-2); font-variant-numeric:tabular-nums}
.calc-note{font-size:11.5px; color:rgba(242,245,248,.5); margin-top:12px; line-height:1.6}

input[type="range"]{
  -webkit-appearance:none; appearance:none; width:100%; height:5px; border-radius:5px;
  background:var(--surface-3); outline:none; margin-block:12px}
input[type="range"]::-webkit-slider-thumb{
  -webkit-appearance:none; appearance:none; width:20px; height:20px; border-radius:50%;
  background:var(--brass); cursor:pointer; border:3px solid var(--surface); box-shadow:var(--shadow-1)}
input[type="range"]::-moz-range-thumb{
  width:20px; height:20px; border-radius:50%; background:var(--brass); cursor:pointer;
  border:3px solid var(--surface); box-shadow:var(--shadow-1)}

@media (max-width:900px){
  .year-top{grid-template-columns:1fr; gap:20px; padding:24px}
  .year-courses{padding:22px 24px 26px}
  .calc{grid-template-columns:1fr}
  .rail{grid-template-columns:repeat(3,1fr); gap:24px 0}
  .rail::before{display:none}
  .course-q{grid-template-columns:1fr auto; gap:8px}
  .course-code{grid-row:2; justify-self:start}
}
@media (max-width:520px){
  .rail{grid-template-columns:repeat(2,1fr)}
  .switcher{width:100%}
  .switcher button{flex:1; justify-content:center; padding-inline:12px}
}